Hey! want to know why the 2b is variation and not combination if the order doesnt matter.
Here order is implied in the sense that even though it’s not explicitly stated (e.g. 1st, 2nd, 3rd etc), it matters which banner is used for each platform. Hence, we use variations.
Otherwise, we would be considering Facebook using banner A & Messenger – banner B to be the same as Facebook using banner B, while Messenger uses banner A and so on.
Hope this helps!